config SECURITY_SELINUX bool "NSA SELinux Support" depends on SECURITY_NETWORK && AUDIT && NET && INET select NETWORK_SECMARK default n help This selects NSA Security-Enhanced Linux (SELinux). You will also need a policy configuration and a labeled filesystem. You can obtain the policy compiler (checkpolicy), the utility for labeling filesystems (setfiles), and an example policy configuration from <http://www.nsa.gov/selinux/>. If you are unsure how to answer this question, answer N. config SECURITY_SELINUX_BOOTPARAM bool "NSA SELinux boot parameter" depends on SECURITY_SELINUX default n help This option adds a kernel parameter 'selinux', which allows SELinux to be disabled at boot. If this option is selected, SELinux functionality can be disabled with selinux=0 on the kernel command line. The purpose of this option is to allow a single kernel image to be distributed with SELinux built in, but not necessarily enabled. If you are unsure how to answer this question, answer N. config SECURITY_SELINUX_BOOTPARAM_VALUE int "NSA SELinux boot parameter default value" depends on SECURITY_SELINUX_BOOTPARAM range 0 1 default 1 help This option sets the default value for the kernel parameter 'selinux', which allows SELinux to be disabled at boot. If this option is set to 0 (zero), the SELinux kernel parameter will default to 0, disabling SELinux at bootup. If this option is set to 1 (one), the SELinux kernel parameter will default to 1, enabling SELinux at bootup. If you are unsure how to answer this question, answer 1. config SECURITY_SELINUX_DISABLE bool "NSA SELinux runtime disable" depends on SECURITY_SELINUX default n help This option enables writing to a selinuxfs node 'disable', which allows SELinux to be disabled at runtime prior to the policy load. SELinux will then remain disabled until the next boot. This option is similar to the selinux=0 boot parameter, but is to support runtime disabling of SELinux, e.g. from /sbin/init, for portability across platforms where boot parameters are difficult to employ. If you are unsure how to answer this question, answer N. config SECURITY_SELINUX_DEVELOP bool "NSA SELinux Development Support" depends on SECURITY_SELINUX default y help This enables the development support option of NSA SELinux, which is useful for experimenting with SELinux and developing policies. If unsure, say Y. With this option enabled, the kernel will start in permissive mode (log everything, deny nothing) unless you specify enforcing=1 on the kernel command line. You can interactively toggle the kernel between enforcing mode and permissive mode (if permitted by the policy) via /selinux/enforce. config SECURITY_SELINUX_AVC_STATS bool "NSA SELinux AVC Statistics" depends on SECURITY_SELINUX default y help This option collects access vector cache statistics to /selinux/avc/cache_stats, which may be monitored via tools such as avcstat. config SECURITY_SELINUX_CHECKREQPROT_VALUE int "NSA SELinux checkreqprot default value" depends on SECURITY_SELINUX range 0 1 default 1 help This option sets the default value for the 'checkreqprot' flag that determines whether SELinux checks the protection requested by the application or the protection that will be applied by the kernel (including any implied execute for read-implies-exec) for mmap and mprotect calls. If this option is set to 0 (zero), SELinux will default to checking the protection that will be applied by the kernel. If this option is set to 1 (one), SELinux will default to checking the protection requested by the application. The checkreqprot flag may be changed from the default via the 'checkreqprot=' boot parameter. It may also be changed at runtime via /selinux/checkreqprot if authorized by policy. If you are unsure how to answer this question, answer 1. config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT bool "NSA SELinux enable new secmark network controls by default" depends on SECURITY_SELINUX default n help This option determines whether the new secmark-based network controls will be enabled by default. If not, the old internal per-packet controls will be enabled by default, preserving old behavior. If you enable the new controls, you will need updated SELinux userspace libraries, tools and policy. Typically, your distribution will provide these and enable the new controls in the kernel they also distribute. Note that this option can be overridden at boot with the selinux_compat_net parameter, and after boot via /selinux/compat_net. See Documentation/kernel-parameters.txt for details on this parameter. If you enable the new network controls, you will likely also require the SECMARK and CONNSECMARK targets, as well as any conntrack helpers for protocols which you wish to control. If you are unsure what to do here, select N. config SECURITY_SELINUX_POLICYDB_VERSION_MAX bool "NSA SELinux maximum supported policy format version" depends on SECURITY_SELINUX default n help This option enables the maximum policy format version supported by SELinux to be set to a particular value. This value is reported to userspace via /selinux/policyvers and used at policy load time. It can be adjusted downward to support legacy userland (init) that does not correctly handle kernels that support newer policy versions. Examples: For the Fedora Core 3 or 4 Linux distributions, enable this option and set the value via the next option. For Fedora Core 5 and later, do not enable this option. If you are unsure how to answer this question, answer N. config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE int "NSA SELinux maximum supported policy format version value" depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX range 15 23 default 19 help This option sets the value for the maximum policy format version supported by SELinux. Examples: For Fedora Core 3, use 18. For Fedora Core 4, use 19. If you are unsure how to answer this question, look for the policy format version supported by your policy toolchain, by running 'checkpolicy -V'. Or look at what policy you have installed under /etc/selinux/$SELINUXTYPE/policy, where SELINUXTYPE is defined in your /etc/selinux/config.